Display Polarity, Stimulus Exposure Duration, and Visual Lobe Shape

Chiu, Cathy H. Y.; Chan, Alan H. S.

doi:10.2466/pms.104.2.467-480

Cited by 8 publications

(6 citation statements)

References 24 publications

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“…In fact, the results are in accordance with the finding of Bauer and Cavonius (1980) that positive polarity can enhance sensitivity in contrast, speed of lens accommodation and reduce optical distortion, all of which are essential for better performance with the visual lobe mapping task. Chiu and Chan (2007) conducted a visual lobe mapping experiment on display polarity without variation of luminance or luminance contrast and found that visual lobe characteristics mapped under negative polarity was superior to that mapped under positive polarity. The contrast level used by them was 13:1 which is close to the low contrast level of 5:1 in this study.…”

Section: Display Polaritymentioning

confidence: 98%

“…Work on defining the optimum time to spend on inspection has been a major theme in visual search research for the past forty years (Krendel and Wodinsky 1960, Bloomfield 1973, Morawski et al 1980, Chan and Chan 2000, Chan and Yu 2010. Visual search has often been modeled as a sequence of fixations or glimpses so that the visual lobe of the person is moved around to cover the search area until a fault is detected (Chiu and Chan 2007, Repperger et al 2007, Gallwey 2009). …”

Section: Introductionmentioning

confidence: 98%

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Effect of display polarity and luminance contrast on visual lobe shape characteristics

2012

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The effect of display polarity and luminance contrast on visual lobe (effective visual field) shape characteristics was studied using three levels of luminance contrast with combinations of positive and negative polarities. The binocular effective visual field for a detection task, with a peripherally presented target (V) embedded in a homogeneous competing background (Xs), was mapped on 24 imaginary axes passing through the fixation point. The results showed that visual lobes mapped using positive polarity were statistically larger in area, rounder and more regular in shape than those for negative polarity. The medium contrast condition lobes were more symmetric and regular than low contrast condition lobes, and lobe area and perimeter increased with increasing luminance contrast ratio. Under the interaction of positive polarity and high luminance contrast, visual lobes were found to be larger, smoother and rounder. The high level of luminance and contrast however resulted in a higher degree of visual discomfort. The results indicated that positive polarity and contrast of medium (26:1) to high (41:1) levels are possible display settings for better visual lobe characteristics and better anticipated search performance.Practitioner Summary: The effect of display polarity and luminance contrast on visual lobe shape characteristics was examined with uniform stimulus materials in this study. The results help to identify the optimum display settings for luminance contrast and display polarity to enhance lobe shape characteristics and hence search performance in industrial inspection tasks.

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Section: Display Polaritymentioning

confidence: 98%

Section: Introductionmentioning

confidence: 98%

Effect of display polarity and luminance contrast on visual lobe shape characteristics

2012

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“…Taptagaporn and Saito (1990) also recommended negative-polarity displays for dark environments based on changes in pupil diameter as an indicator of possible visual fatigue. Chiu and Chan (2007) further examined the visual lobe (visual contour) shape under different display polarities and stimulus exposure durations. In general, visual lobes have been described as roughly oval, with the horizontal axis longer than the vertical one.…”

Section: Display Polaritymentioning

confidence: 99%

Effects of Translational and Rotational Motions and Display Polarity on Visual Performance

et al. 2008

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This study investigated effects of both translational and rotational motion and display polarity on a visual identification task. Three different motion types--heave, roll, and pitch--were compared with the static (no motion) condition. The visual task was presented on two display polarities, black-on-white and white-on-black. The experiment was a 4 (motion conditions) x 2 (display polarities) within-subjects design with eight subjects (six men and two women; M age = 25.6 yr., SD = 3.2). The dependent variables used to assess the performance on the visual task were accuracy and reaction time. Motion environments, especially the roll condition, had statistically significant effects on the decrement of accuracy and reaction time. The display polarity was significant only in the static condition.

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“…Some recent studies have investigated the changes in visual lobe shape for different task conditions. Chiu and Chan (2007) found that visual lobes mapped with negative display polarity were significantly rounder than those mapped with positive polarity. When stimulus exposure duration increased from 200 to 400 ms, there were significant increases in the visual lobe area, perimeter, roundness, boundary smoothness, and regularity.…”

Section: Introductionmentioning

confidence: 99%

Visual lobe shape characteristics of experienced industrial inspectors and inexperienced subjects

Chan

Chiu

2010

Hum Ftrs & Erg Mfg Svc

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This article reports research on visual lobe shape differences between experienced industrial inspectors and inexperienced students and the effects of years of inspection experience on lobe-shape characteristics. Comparison of the visual lobes of students and inspectors showed that lobe roundness of the inspectors was higher than that of the students. Also, marked improvement in lobe roundness and regularity for inspectors was evident in those inspectors who had relatively long experience in inspection work, indicating that daily inspection practice did not seem to be an effective way of improving lobe-shape characteristics. The increased lobe roundness level did not change, however, even when the inspectors had not performed an inspection job for a long period of time. This finding suggests that the improved lobe-roundness level could be maintained even without any follow-up inspection practice. It seems that intensive lobe training rather than inspection practice may be required to improve lobeshape characteristics in a short time. No relationship was found between lobe-shape parameters and the ranked inspection performance of the inspectors, which indicated that, for the inspectors, better search performance may be related more to their better decision making rather than to their higher lobe-roundness level or inspection speed. C 2010 Wiley Periodicals, Inc.

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Display Polarity, Stimulus Exposure Duration, and Visual Lobe Shape

Cited by 8 publications

References 24 publications

Effect of display polarity and luminance contrast on visual lobe shape characteristics

Effect of display polarity and luminance contrast on visual lobe shape characteristics

Effects of Translational and Rotational Motions and Display Polarity on Visual Performance

Visual lobe shape characteristics of experienced industrial inspectors and inexperienced subjects

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